CVE-2025-15435 Overview
A SQL injection vulnerability has been discovered in Yonyou KSOA version 9.0. The vulnerability exists in the /worksheet/work_update.jsp file, where improper handling of the Report parameter allows remote attackers to inject malicious SQL queries. This flaw enables attackers to manipulate database operations without authentication, potentially compromising data integrity and confidentiality. The vendor was notified about this vulnerability but did not respond.
Critical Impact
Remote attackers can exploit this SQL injection vulnerability to read, modify, or delete sensitive database information, potentially leading to complete database compromise and data exfiltration.
Affected Products
- Yonyou KSOA 9.0
Discovery Timeline
- 2026-01-02 - CVE CVE-2025-15435 published to NVD
- 2026-01-07 - Last updated in NVD database
Technical Details for CVE-2025-15435
Vulnerability Analysis
This SQL injection vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) affects the /worksheet/work_update.jsp endpoint in Yonyou KSOA 9.0. The flaw exists due to insufficient input validation and sanitization of the Report parameter before it is incorporated into SQL queries executed against the backend database.
The vulnerability is remotely exploitable without requiring authentication, allowing attackers to execute arbitrary SQL commands against the database server. Successful exploitation could enable unauthorized access to sensitive data, modification of database records, or disruption of database operations.
Root Cause
The root cause of this vulnerability is inadequate input validation in the work_update.jsp file. The Report parameter is directly incorporated into SQL queries without proper sanitization or parameterized query implementation. This allows attackers to break out of the intended SQL statement structure and inject arbitrary SQL commands.
Attack Vector
The attack is initiated remotely over the network. An attacker can craft a malicious HTTP request to the vulnerable /worksheet/work_update.jsp endpoint, including specially crafted SQL syntax within the Report parameter. The server processes this input without proper validation, executing the injected SQL commands against the backend database.
The exploitation technique involves manipulating the Report parameter with SQL meta-characters and additional SQL statements. By appending SQL commands such as UNION SELECT statements or stacked queries, attackers can extract data from arbitrary database tables, modify existing records, or perform administrative database operations depending on the database user privileges.
Detection Methods for CVE-2025-15435
Indicators of Compromise
- Unusual HTTP requests to /worksheet/work_update.jsp containing SQL keywords or special characters in the Report parameter
- Database query logs showing anomalous queries with UNION, SELECT, INSERT, UPDATE, or DELETE statements originating from web application requests
- Error messages in application logs indicating SQL syntax errors from malformed injection attempts
- Unexpected database access patterns or queries accessing system tables
Detection Strategies
- Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in HTTP requests targeting /worksheet/work_update.jsp
- Monitor database query logs for suspicious query patterns that include SQL injection signatures
- Implement intrusion detection signatures for known SQL injection attack patterns in network traffic analysis
Monitoring Recommendations
- Enable verbose logging for the KSOA application to capture all requests to the /worksheet/work_update.jsp endpoint
- Set up real-time alerting for database errors that may indicate SQL injection attempts
- Monitor network traffic for abnormal data exfiltration patterns that could indicate successful database compromise
How to Mitigate CVE-2025-15435
Immediate Actions Required
- Restrict network access to the Yonyou KSOA application to trusted IP addresses only
- Implement a Web Application Firewall (WAF) to filter SQL injection attempts targeting the /worksheet/work_update.jsp endpoint
- Review and audit database permissions to ensure the application uses least-privilege database accounts
- Consider disabling or restricting access to the vulnerable work_update.jsp functionality until a patch is available
Patch Information
No official patch from Yonyou is currently available. The vendor was contacted about this vulnerability but did not respond. Organizations should monitor for security updates from Yonyou and apply patches as soon as they become available. For additional technical details, refer to the GitHub CVE Issue Discussion and VulDB entry #339362.
Workarounds
- Deploy input validation at the web server or reverse proxy level to sanitize the Report parameter before it reaches the application
- Implement database connection firewall rules to restrict the types of queries that can be executed
- Use network segmentation to isolate the KSOA application from critical internal resources
- Enable database activity monitoring to detect and alert on suspicious query patterns
# Example: Apache mod_security rule to block SQL injection attempts
# Add to your ModSecurity configuration
SecRule ARGS:Report "@rx (?i:(\%27)|(\')|(--)|(\%23)|(#)|(union|select|insert|update|delete|drop))" \
"id:100001,phase:2,deny,status:403,msg:'SQL Injection attempt blocked in Report parameter'"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
